Wida, Rianti and Ainul, Fadilah and Alrafi, Pramana and Della Rahma, Yani AnAnalysis on the Students’Mastery in Using Preposition in,on, at. Edumaspul - Jurnal Pendidikan, 7 (2). ISSN (ISSN 2548-8201 (cetak); (ISSN 2580-0469 (online)